The deadly attack took place on Sedgwick Ave. in Morris Heights on Saturday morning, according to police. (Vic Nicastro for New York Daily News)

A berserk boyfriend fatally stabbed his 67-year-old sweetheart in the neck, chest and leg inside the bedroom of their Bronx apartment early Saturday, cops said.

The 60-year-old attacker killed girlfriend Sheila Williams inside the couple's 25th floor home in the Riverview Apartments on Sedgwick Ave. in Morris Heights during a dispute that turned deadly around 1:50 a.m., according to police.

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The victim's 39-year-old daughter, who lives in the apartment building in a different unit, dialed police who rushed to the scene only to find Williams dead inside the home, authorities said.

Her mother's lover slashed her forearm during his violent frenzy but she refused medical attention.

Police investigate the scene of the fatal stabbing, which occured in a 25th floor home at the Riverview Apartments. (Vic Nicastro for New York Daily News)

The boyfriend was taken to St. Barnabas Hospital for medical evaluation and is currently in police custody, officials said.

He was not immediately arrested but is expected to be charged, sources said.